Implement track/stream

* Add Streamer class
* Use FactoryGirl for factories
* Add sha256 field to tracks
* Add mime_type field to tracks

spec/controllers/tracks_controller_spec.rb

@@ -9,6 +9,25 @@ describe TracksController do
     end
   end
 
+  describe 'GET stream' do
+    let(:track) { Factory.create(:track) }
+
+    it 'streams the requested track' do
+      get :stream, :id => track.id.to_s
+      response.should be_success
+    end
+
+    it 'creates a streamer instance' do
+      Streamer.should_receive(:new).with(track.filepath)
+      get :stream, :id => track.id.to_s
+    end
+
+    it 'returns the track mime-type as content-type' do
+      get :stream, :id => track.id.to_s
+      response.content_type.should == track.mime_type
+    end
+  end
+
   describe 'GET new' do
     it 'assigns a new track as @track' do
       get :new
@@ -18,48 +37,52 @@ describe TracksController do
 
   describe 'POST create' do
     let(:track) { mock_model(Track).as_null_object }
+    let(:file) {
+      file = mock(Rack::Test::UploadedFile)
+      file.stub(:tempfile => File.new("#{Rails.root}/spec/fixtures/test.mp3"))
+      file.stub(:content_type => 'audio/ogg')
+      file
+    }
     before { Track.stub(:new).and_return(track) }
 
     it 'creates a new track' do
+      attributes = Factory.attributes_for(:track)
       Track.should_receive(:new).
-        with(Factory.attributes_for(:track)).
+        with({:name => attributes[:name]}).
         and_return(track)
-      post :create, :track => Factory.attributes_for(:track)
+      post :create, :track => {
+        :name => attributes[:name],
+        :file => file
+      }
     end
 
-    it 'saves the track' do
-      track.should_receive(:save)
-      post :create, :track => {}
-    end
-
-    it 'saves the file uploaded for the track' do
-      file = mock(Rack::Test::UploadedFile)
-      track.should_receive(:uploaded_file=).with(file)
+    it 'saves the track with a file' do
+      track.should_receive(:save_with_file).
+        with(file.tempfile, 'audio/ogg')
       post :create, :track => { :file => file }
     end
 
     context 'when the track saves successfully' do
       it 'redirects to the track page' do
-        post :create, :track => Factory.attributes_for(:track)
+        post :create, :track => { :file => file }
         response.should redirect_to(track)
       end
     end
 
     context 'when the track fails to save' do
       before do
-        track.stub(:save).and_return(false)
+        track.stub(:save_with_file).and_return(false)
       end
 
       it 'assigns the track as @track' do
-        post :create, :track => {}
+        post :create, :track => { :file => file }
         assigns[:track].should == track
       end
 
       it 'renders the new template' do
-        post :create, :track => {}
+        post :create, :track => { :file => file }
         response.should render_template('new')
       end
     end
-
   end
 end